| 摘要 |
PURPOSE:To heighten a degree of control accuracy in a fuel flow rate, by controlling an injection valve inside a cylinder for feedback on the basis of an oxygen sensor output, in case of a device which installs each fuel injection valve in the cylinder and a suction passage and drives one side or both fuel injection valves according to an engine driving state. CONSTITUTION:A first fuel injection valve 21 is installed in a cylinder of an engine 1, while a second fuel injection valve 23 is installed in a suction passage 22. These fuel injection valves 21 and 23 drives and controls either or both by a injection valve driving device 24 according to a driving state of the engine 1. That is to say, when the engine 1 is warming up as well as when it is high load, a second fuel injection valve 8 is driven but at the time of light load, a first fuel injection valve 7 is driven. And, when a drive of the first fuel injection valve 7 is detected by a detecting device 25, the first fuel injection valve 7 is made so as to be feedback-controlled on the basis of output of an exhaust gas oxygen content sensor 28 by a feedback controlling device 26.
|
